Preparation method of InVO4/g-C3N4 composite material

A composite material, g-c3n4 technology, applied in the field of preparation of InVO4/g-C3N4 composite materials, to achieve the effect of solving low quantum efficiency, solving poor photoresponse characteristics, and improving high catalytic activity

Active Publication Date: 2015-01-28
ZHEJIANG UNIV
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  • Preparation method of InVO4/g-C3N4 composite material
  • Preparation method of InVO4/g-C3N4 composite material

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[0018] InVO 4 / g -C 3 N 4 The preparation method of composite material, comprises the following steps:

[0019] Step A: Under stirring conditions, H 2 SO 4 The aqueous solution was added dropwise to the melamine aqueous solution to form a white suspension; the precipitate was obtained after stirring at 80°C for 2 hours; the precipitate was filtered, washed three times with distilled water and absolute ethanol, and dried at 60°C for 24 hours to obtain melamine sulfate; Put it into a corundum boat, and then place it in a tube furnace for sintering. After cooling to room temperature, grind the obtained yellow polymerization product into powder particles to obtain g-C 3 N 4 particles;

[0020] Among them, H 2 SO 4 The molar concentration of aqueous solution is 0.02mol / L~2mol / L, the molar concentration of melamine aqueous solution is 0.02mol / L~2mol / L, the amount of control reactant makes H 2 SO 4 The molar ratio to melamine is 5:1~1:2; the protective atmosphere for sinter...

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Abstract

The invention relates to the field of semi-conducting materials and provides a preparation method of an InVO4/g-C3N4 composite material. The preparation method comprises the following steps of dropwisely adding a H2SO4 aqueous solution into a melamine aqueous solution to obtain a white fluid suspension, carrying out stirring at a temperature of 80 DEG C for 2h to obtain precipitates, filtering the precipitates, washing the precipitates by distilled water and anhydrous ethanol, carrying out drying to obtain melamine sulphate, acquiring g-C3N4 particles, dispersing the g-C3N4 particles into anhydrous ethanol to obtain a dispersed system, dropwisely adding an ammonium metavanadate aqueous solution into the mixed solution to obtain a yellow clear solution, carrying out stirring to obtain precipitates, carrying out filtration and washing on the precipitates, adding a surfactant into the precipitates, carrying out a hydrothermal reaction process, and filtering the produced precipitates to obtain the InVO4/g-C3N4 composite material. The preparation method realizes InVO4 nano-crystal nucleation and growth and promotes in-situ growth of the InVO4 nano-crystal on the surfaces of loose g-C3N4 particles.

Description

technical field [0001] The present invention relates to the field of semiconductor materials, in particular to InVO 4 / g -C 3 N 4 Methods of preparation of composite materials. Background technique [0002] Graphite-like carbon nitride (g-C 3 N 4 ) has attracted widespread attention because of its good chemical stability, suitable energy band position, and economic and environmental protection characteristics, showing good application prospects in the fields of solar energy utilization and environmental protection. but pure phase g-C 3 N 4 The energy gap is about 2.7eV, and only sunlight below 460nm can be used, and the polymerization product is a dense block particle, which has problems such as low specific surface area, weak separation ability of photogenerated carriers, and poor photocatalytic activity, which limits the material. wide application. At present, studies have used element doping, porous and nanostructured structures, semiconductor heterogeneous compou...

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IPC IPC(8): B01J27/24C01G31/00C01B21/082
Inventor 杨辉沈建超申乾宏冯宇蔡奇风
Owner ZHEJIANG UNIV
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